Roof of the building
Roof is the weak link in furnace of roof is solid and reliable, and has a significant effect on industrial furnace work. Especially in melting furnace, often due to the limitation of furnace top temperature and prevent industrial furnace productivity.
Due to the damage of box-type furnace roof to reduce industrial furnace operation efficiency, etc., so in the design of the industrial furnace to the reliability of the roof must give enough attention to.
Roof according to its structure can be divided into the vault and ceiling (suspension). Vault is the advantages of simple structure, convenient construction and low cost. Width (span) industrial furnace when the furnace is less than 4 m, the arch structure can be used. Vaults available wedge brick masonry or concrete is monolithic refractories. Vaults of the central Angle 60 °, 90 °, 180 °, 60 ° commonly used vault is called the standard arch, the span of its radius R is equal to the industrial furnace, B vaults rise h = 0.0134 B.
(1) can be used 180 ° Angle at centre vault area:
(1) the flue lining vaults.
(2) regenerative chamber vault.
(3) inspection hole vault.
(2) in the following circumstances, can use multilayer arch structure of 60 or 90:
(1) to improve the box-type furnace structure strength and does not increase the thickness of the single arch.
(2) when required in the vault in the thickness direction hierarchy stagger
(3) local vault often need repairing, such as feeding mouth vaults, small combustion chamber vault, etc.
Weight to vault into horizontal force and vertical gravity reached on the basis of through the steel structure, brick beam and arch foot arch with arch feet. Brick arch foot according to arch development Angle and optional vault fireproof layer thickness, the size of the foot arch beam are determined according to the strength calculation.